.\" Copyright (c) 2009 Joseph Koshy.  All rights reserved.
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.\" $Id$
.\"
.Dd December 12, 2009
.Os
.Dt DWARF_FINISH 3
.Sh NAME
.Nm dwarf_finish
.Nd free resources associated with a debug descriptor
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fn dwarf_finish "Dwarf_Debug dbg" "Dwarf_Error *err"
.Sh DESCRIPTION
The
.Fn dwarf_finish
function is used to release the resources associated with a debug
descriptor allocated by a prior call to
.Xr dwarf_init 3 .
.Pp
Argument
.Ar dbg
denotes a valid
.Vt Dwarf_Debug
instance.
Argument
.Ar err
will be used to record error information in case of an error.
.Pp
After a call to
.Fn dwarf_finish
argument
.Ar dbg
will be invalid and should not be used further.
.Pp
For
.Vt Dwarf_Debug
descriptors opened using
.Xr dwarf_init 3 ,
the application would need to explicitly release the
.Vt Elf
instance associated with the descriptor by first retrieving
the instance using
.Xr dwarf_get_elf 3
and closing it using
.Xr elf_end 3 .
.Sh RETURN VALUES
Function
.Fn dwarf_finish
returns
.Dv DW_DLV_OK
if successful.
In case of an error, the function returns
.Dv DW_DLV_ERROR
and records additional information in argument
.Ar err .
.Sh EXAMPLES
To deallocate a
.Vt Dwarf_Debug
instance allocated using
.Xr dwarf_elf_init 3
use:
.Bd -literal
	Dwarf_Debug dbg;
	Dwarf_Error de;

	if (dwarf_finish(dbg, &de) != DW_DLV_OK)
		errx(1, "dwarf_finish: %s", dwarf_errmsg(de));
.Ed
.Pp
To deallocate a
.Vt Dwarf_Debug
instance allocated using
.Xr dwarf_init 3
use:
.Bd -literal
	Dwarf_Debug dbg;
	Dward_Error de;
	Elf *e;

	if (dwarf_get_elf(dbg, &e, &de) != DW_DLV_OK)
		errx(1, "dwarf_get_elf: %s", dwarf_errmsg(&de));

	if (dwarf_finish(dbg, &de) != DW_DLV_OK)
		errx(1, "dwarf_finish: %s", dwarf_errmsg(de));

	(void) elf_end(e);
.Ed
.Sh SEE ALSO
.Xr elf_end 3 ,
.Xr dwarf_elf_init 3 ,
.Xr dwarf_get_elf 3 ,
.Xr dwarf_init 3
